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Formosa Weather by Month
Average temperatures, rainfall and humidity for Formosa, Brazil, month by month, built from OpenWeather’s historical records. Use it to see what a typical Formosa month looks like before you travel — then check the live Formosa forecast for the days ahead.
Warmest month
September
30°C average high
Coolest month
July
12°C average low
Wettest month
November
86 mm of rain
Driest month
August
5 mm of rain
Average temperature and rainfall in Formosa by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 28°C | 19°C | 15°C / 33°C | 82 mm | 74% | 10 km/h |
| February | 28°C | 19°C | 13°C / 33°C | 73 mm | 75% | 10 km/h |
| March | 28°C | 18°C | 14°C / 33°C | 60 mm | 75% | 9 km/h |
| April | 27°C | 18°C | 12°C / 31°C | 47 mm | 74% | 9 km/h |
| May | 27°C | 15°C | 6°C / 30°C | 22 mm | 68% | 9 km/h |
| June | 26°C | 13°C | 8°C / 31°C | 11 mm | 64% | 10 km/h |
| July | 26°C | 12°C | 6°C / 31°C | 9 mm | 55% | 10 km/h |
| August | 28°C | 14°C | 8°C / 34°C | 5 mm | 49% | 11 km/h |
| September | 30°C | 16°C | 9°C / 36°C | 12 mm | 48% | 11 km/h |
| October | 30°C | 18°C | 11°C / 37°C | 52 mm | 59% | 10 km/h |
| November | 28°C | 19°C | 14°C / 35°C | 86 mm | 74% | 10 km/h |
| December | 28°C | 19°C | 15°C / 34°C | 75 mm | 74% | 10 km/h |
Best time to visit Formosa
The most comfortable time to visit Formosa is generally May to July, balancing mild daytime temperatures against the driest stretch of the year. Temperatures stay fairly even all year and rain concentrates around November, totalling about 532 mm a year.
Travellers who prefer heat should aim for September, when highs average 30°C. November is the month to avoid if rain would spoil your plans — it averages 86 mm, roughly 17× the rainfall of the driest month (August).
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Formosa forecast for what is happening now.